Abstract: The present invention relates to a self-propelled material processing and/or handling system for processing and/or handling construction and/or raw materials, in particular in the form of a mobile crushing system, with at least one working unit, which is drivable, by an electric unit drive, with an electric motor, at least one electric travel drive with an electric motor, as well as a control device to control the electric motors of the unit and travel drives. According to the invention, the control device comprises a common frequency converter for the at least one travel drive and the at least one unit drive and provides various parameter sets for the common frequency converter so that the travel drive is actuatable by the frequency converter on the basis of a first parameter set and the unit drive is actuatable by the common frequency converter on the basis of a second parameter set.

Abstract: The invention relates to a method for determining an error voltage of a current converter to which a load, in particular in the form of a three-phase machine such as an asynchronous machine, is connected, is determined and if necessary compensated, wherein an output voltage on the current converter is increased stage-by-stage or step-by-step and which is measured here as a current adjusting a step response. The invention further relates to a three-phase machine, for example in the form of an asynchronous machine having power electronics comprising a current converter and in the form of a compensation device for compensating the error voltage of the current converter. The invention further relates to a method for operating and/or controlling such a three-phase machine, in which the error voltage of the current converter is determined and compensated.

Abstract: The invention relates to a free fall winch comprising a drum, which can be rotationally driven by a winch drive, wherein a free fall brake is provided for braking the drum in free fall operation. According to the invention, a torque acting on the free fall winch, which depends on the free fall braking torque, is detected by means of a detection device, and a brake actuation force with which the free fall brake is actuated is controlled or adjusted by a control device according to the detected torque.

Abstract: A method and apparatus for tightening a screw connection having a motor-operated screwdriver unit, wherein the angle of rotation and the torque are determined during the tightening to be able to stop the tightening process on reaching a desired tightening tension. An increase in the torque over the angle of rotation is determined by a determination device in a first tightening region and a change in the increase in the torque over the angle of rotation is determined in a second, following tightening region, with the screwdriver unit being stopped by a control device on reaching or exceeding of a maximum permitted change in the increase and/or of a change speed that is determined with reference to the increase that occurred in the first tightening region.

Abstract: In general, the invention relates to wind turbines, the rotor blades of which can be adjusted in terms of their pitch angle. The invention relates in particular to an actuating drive for adjusting the pitch angle of a rotor blade of a wind turbine, comprising a large rolling bearing which comprises two bearing rings that can be rotated relative to each other, and an actuator for rotating the two bearing rings relative to each other. According to the invention, the actuating drive comprises a ring channel cylinder, which is formed in one of the bearing rings, and at least one piston, which is received in the ring channel cylinder in a movable manner and is drivingly connected to the other bearing ring of the two bearing rings.

Abstract: The present invention relates to adjustment and/or drive units which can be used in wind power plants for adjusting the azimuth angle of the nacelle of the wind power plant or the pitch angle of the rotor blades, wherein such an adjustment and/or drive unit has at least two adjusting drives for rotating two assemblies which are mounted so as to be rotatable relative to each other, and has a control device for controlling the adjusting drives. The control device controls the adjusting drives in such a manner that the adjusting drives are braced relative to each other during the rotation of the two assemblies and/or when the assemblies are at standstill. The invention further relates to a wind power plant comprising such an adjustment and/or drive unit, and to a method for controlling such an adjustment and/or drive unit.

Abstract: The invention relates to a cable drum for a cable winch of a cable drive, having a drum body and two guard plates which surround the drum body on the face sides and delimit a winding space therebetween, wherein at least one of the guard plates has at least one inner wall part which is adjustable axially in the direction of the drum longitudinal axis such that the distance between the guard plates is adjustable.

Abstract: The present invention relates to rope drums for winding and unwinding ropes, having a drum shell, to which end disks are fastened at the end faces, and to rope winches having such rope drums. The invention also relates to a method for producing such a rope drum. According to the invention, the drum shell is seamlessly rolled from an annular workpiece blank by means of a rope groove profile embossed in a non-cutting manner.

Abstract: The present invention relates to a cable winch, in particular a hoisting gear winch of a hoist, comprising a cable drum, an entry guide for a cable to be wound onto the cable drum, and an actuating drive for adjusting the entry guide relative to the cable drum. The invention also relates to a hoisting device, in particular in the form of a crane, having such a cable winch. According to the invention, a detection unit for detecting an image of the progression of the winding of the cable wound onto the cable drum is provided and the control unit is designed to adjust the entry guide relative to the cable drum depending on the winding progression image captured.

Abstract: A self-propelled work machine, in particular a tracked vehicle, such as a bulldozer, having a traction drive comprising at least one electric motor for driving at least one chassis wheel, in particular a chain wheel or a sprocket. The motor axis of rotation of the electric motor is arranged displaced and/or angled with respect to the wheel axis of rotation of the chassis wheel to be driven by the electric motor.

Abstract: An open-centered large rolling bearing having two concentric bearing rings, which are supported against one another in the axial direction of the rolling bearing by means of at least two axial bearings, which are arranged on opposite end faces of a bearing ring. In the radial direction, the bearing rings are supported against one another by at least three radial bearings, which are arranged on inner and outer circumferential sides of a bearing ring.

Abstract: The invention relates to a cooling device for cooling an energy accumulator and/or electronic assembly, comprising a preferably plate-shaped heat sink in whose interior at least one coolant channel is formed, wherein the heat sink comprises two sheet metal blanks cohesively joined onto each other surface to surface, wherein one sheet metal blank has a channel-shaped bulge that bulges out of the joining plane of the two sheet metal blanks with about the same wall thickness, is connected to the other sheet metal blank only at its edge, and forms the coolant channel.

Abstract: A multi-row rolling bearing having an inner ring and an outer ring and at least two axial rolling bearing rows for supporting axial forces between the inner and outer ring, wherein the two axial rolling bearing rows are seated on opposite axial sides of a radially projecting annular lug which engages in an annular groove and which is supported by means of the axial rolling bearing rows against the annular groove. According to the invention, at least one of the axial rolling bearing rows is formed as an angular-contact roller bearing with an angle of inclination of greater than 0° to at most 45°.

Abstract: Adjustment and/or drive units that can be used in wind turbines to set the azimuth angle of the wind turbine nacelle or the pitch angle of the rotor blades, wherein such an adjustment and/or drive unit has at least two actuating drives for rotating two assemblies, which are mounted for rotation relative to each other, and has a control device for controlling the actuating drives, which control device controls the actuating drives in such a way that the actuating drives are braced in relation to each other during the rotation of the two assemblies and/or at a standstill of the assemblies. The invention further relates to a wind turbine having such an adjustment and/or drive unit and to a method for controlling such an adjustment and/or drive unit.

Abstract: The present invention relates in general to slurry wall cutters for cutting slurry walls in specialist foundation engineering. The invention relates in particular to the cutting wheel assembly for such a slurry wall cutter (1), comprising a rotationally drivable cutter hub (8) and a cutting wheel (3) which can be detachably fastened to the cutter hub for conjoint rotation. According to the invention, the cutting wheel and the cutter hub are clamped against one another at the end faces thereof and are interlockingly secured to one another in order to transmit the high operating forces non-frictionally or at least not only frictionally. According to the invention, the end faces of the cutting wheel and the cutter hub that can be placed against one another are provided with lateral teeth (16, 17) which mesh with one another for conjoint rotation. The meshing pair of lateral teeth allows the cutter hub and the cutting wheel to be interlockingly held relative to one another for conjoint rotation.

Abstract: The invention relates to a drive device for a diaphragm wall cutter, with a hydraulic motor, a gear unit, to which at least one cutting wheel of the diaphragm wall cutter can be connected on the output side, and a drive shaft which connects the hydraulic motor to the gear unit, wherein the drive shaft is mounted by way of at least one drive shaft bearing which is arranged between the hydraulic motor and the gear unit, wherein the drive shaft bearing has a lubricant feed line which is connected to a leakage discharge line of the hydraulic motor and/or to the hydraulic circuit in order to operate the hydraulic motor, and is configured to lubricate the drive shaft bearing with hydraulic oil.

Abstract: The invention relates to a bus-capable device having an input interface and an output interface for connecting to a serial bus, particularly a CAN bus, wherein the input interface and the output interface each have at least one signal line connection, and further having a terminating resistor for terminating the bus and a switch apparatus for switching the terminating resistor active as a function of the connection status of the input and output interfaces, wherein the input interface and the output interface each having a supply voltage connection for providing a supply voltage to the output and/or input interfaces of a respective next bus-capable device and a feedback connection for receiving the supply voltage from an output and/or input interface of a respective next bus-capable device, wherein the switch apparatus has an evaluation circuit for determining the presence of the supply voltage at the feedback connections of the input and output interfaces and an activation circuit for switching the terminati

Abstract: The present invention relates to a cable drum for a cable winch of a cable drive, having a drum shell and two flanged wheels which adjoin the drum shell at the ends, wherein the drum shell and/or the flanged wheels are produced from fiber-reinforced composite material, wherein the drum shell and/or the flanged wheels have a multi-shell structure having at least two walls made of fiber-reinforced composite material, which walls are spaced apart from each other and connected to each other by a foam core.

Abstract: The present invention relates to a free-fall winch comprising a drum which can be rotatorily driven by a winch drive via a transmission and can be retained by a holding brake, wherein in addition to the holding brake a free-fall brake is provided for slowing down the drum in free-fall operation. According to the invention, the free-fall brake is arranged between winch drive and holding brake on the one hand and drum on the other hand such that when the free-fall brake is open, the drum is decoupled from the winch drive and from the holding brake and can be rotated at idle with respect to the winch drive and the holding brake.

Abstract: The present invention relates to a tower crane with a load lifting means mounted on a hoisting cable, driving devices for moving several crane elements and traversing the load lifting means, and a control device for controlling the driving devices such that the load lifting means moves along a traversing path between at least two target points. The control device has a traversing path determining module for determining a desired traversing path between the at least two target points and an automatic traversing control module for automatically traversing the load lifting means along the determined traversing path.